The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6220-01-188-5610
NSN 5975-00-021-7127
NSN 5855-01-546-2810
NSN 5855-01-369-5037
NSN 5985-01-559-8044
NSN 5999-01-620-8867
NSN 5905-01-138-0573
NSN 6320-00-823-2015
NSN 4140-00-179-3977
NSN 6645-01-335-3299
NSN 5930-01-351-0999
NSN 6620-00-477-7808